Sorting machine



Nov. 29,1938. A J REY 2,138,645

' SORTING MACHINE Filed Jul 26, 1954 9 Sheets-Sheet 1 F IGJ.

INVENTOR.

Nov. 29, 1938. E. J. F. REY

SORTING MACHINE Filed July 26, 1934 9 Sheets-Sheet 2 E. J. F. REY

SORTING MACHINE 7 Nov. 29, 1938.

9 Sheets Sheet 5 Filed July 26, 1934 INVENTOR.

"W. KMW

A TTORNEYS.

Nov. 29, 1938,, v E F, RE I 2,138,645

SORTING MACHINE Filed July 26, 1934 9 Shets-Sheet 4 IA IVENTOR. PM R,

A TTORNEYS.

Nov. 29, 1938. EJJ. F. REY

SORTING MACHINE Filed July 26, 1954 9 Sheets-Sheet 5 I INVENTOR.

05 (2 KM-+ Mm ATTORNEYS.

Nov. 29; 1938. E. J. F. REY 2,138,645

. SORTING MACHINE Filed July 26, 1954 9 Sheets-Sheet 6 A TTORNEYS.

Nov. 29, 1938. E. J. F. REY

' SORTING MACHINE 9 Sheets-Sheet '7 Filed July 26, 12;;4

INVENTOR. i W 'a ATTORNEYS.

MQQE Nov. 29, 1938. E. J. F. REY 2,138,645

SOR'IING MACHINE Filed July 26, 1934 9 Sheets-$219M; 9

INVENTORQ Y ATTORNEYS.

Patented Nov. 29, 1938 UNITED STATES 2,138,645 SORTING MACHINE Emile Jean Francois Rey, Boanne, France, as-

signor to Papeteries Navarre, Lyon, France, a limited liability company Application July 26, 1934, Serial N0. 737,129 In France July 29, 1933 27 Claims.

This invention relates to a machine for sorting sheet material such as paper. The machine can be employed in all paper industries where sorting has to be done and also in all other industries where the material is produced in sheets and where the defects which may be found in, these sheets and which necessitate their rejection are of a similar nature to those found in paper sheets. It is among the objects of my invention to provide a machine for sorting sheets inaccordance with desired qualities prescribed for 9. normal or standard sheet of paper or of other sheet material.

Another object of the invention is to provide a machine having mechanism to reject sheets which are too thick or plaited or which contain any impurities such as splinters of wood or of and other kinds of foreign materials; to reject determined or normal length; to reject sheets wanting in the degree of opacity desired; to reject sheets having holes and tears; to reject sheets defective because of the presence -of creases and. crumpling; to reject sheets having blemishes and stains; to reject sheets narrower than a predetermined desired width; to reject sheets having a color or tint different from the color or tint desired, and to reject sheets which are either overweight or underweight of the desired weight.

Another object of the invention is to provide mechanism' enabling the sorting of sheets in accordance with the causes which render them acceptable or non-acceptable.

Another object of the invention is to provide a machine enabling the testing of sheets of paper or of other sheet material which automatically tests for defects affecting size, thickness, opacity. color and weight, and which has provisions for these different qualities in sheets which are acceptable as normal.

With these and incidental objects in view the invention consists of certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claims and a preferred embodiment of which is described hereinafter with reference to the drawings which comprise and form part of the specification.

Figs. 1,2 and 3, whencombined, show the g5 rotary relays illustrated in Fig. Land includes sheets which are longer or shorter than a preenabling variation of permissible tolerances of (Cl. zoo-'15) switch operating means of the first and fourth rotary relays.

Fig. 5 is a sectional view on line 55 of Fig. 4.

Fig. 6 is a. sectional view on line 6--6 of Fig. 4.

Fig. 7 illustrates the relation of a switch to 5 its actuating pin as carriedby the second rotary relay.

Fig. 8 is a front elevation of the switch illustrated in Fig. 7.

Fig. 9 illustrates the relation of a switch to 10 its actuating pin as carried by the third rotary relay.

Fig. 10 is a detail of a shutter operating mechanism and shutter for shielding the photo electric cell by which defects in shade are detected.

Fig. 11 is a plan showing the lateral slot, lenses and shutter of the mechanism by which defects in shade are detected.

Fig. 12 is a partial sectional view through the shutter, lenses and light projecting and receiving devices by which defects in shade are detected.

Figs. 13 and 14 are details showingthe magnet v and shutter, by which light is J controlled, for detecting defects due to color.

Fig. 15' is an enlarged view of the weighing mechanism and switches controlled thereby.

Fig. 16 is an enlarged view of one of the mere cury switches which is actuated by the pointer o the weighing mechanism.

Fig. 17 is an elevation on line -l|--ll of Fig. 15. 3

Fig. 18 is a detail of a mercury switch.

Fig. 19 is a side view of the thickness measuring mechanism illustrated at the left of Fig. 1.

' Fig. 20 is a plan of the mechanism illustrated in Fig. 19.

Fig. 21 is a side view of the rollers of the mechanism which determines which sheets are to be accepted or rejected on account of length.

Fig. 22 is a plan of the mechanism illustrated in Fig. 21. 4

The sheets of paper or of other material which are tobe sorted are fed. to the machine by a feeder. This feeder may be of thekind that is generally used for feeding paper to printing machines or of any other well known kind. The sorting. machine is operated intimecl relation with the feeding oi the successive sheets from .the feeding machine. The sorting machine of the present invention automatically tests sheets of paper passing therethrough and sorts the same in accordance with'the quality as determined in the various tests. The sheets which are accepted as normal are sorted, counted'and collected at a receiving station located at the end .of the machine, Fig. 3. A-generai diagrammatic 56 layout of the machine is shown in Figs. 1, 2 and 3. The paper feeding machine continuously feeds sheets of paper to the sorting machine while the sorting machine is operating. The sheets are advanced through the machine by rollers which rotate continuously in timed relation to each other. which are shown at the left end of Fig. 1, extend transverse to the frame of the machine and form a part of the mechanism by which the presence of any irregularity is detected which manifest itself in excessive thickness, wheresoever located upon a sheet. This mechanism includes two rows of steel rollers I2 and I3 which-are staggered in respect to each other (some of which are shown in plan in Fig. 20) with the rollers in one row opposite spaces between rollers in the other row so that the entire width of the sheets may be sensed for irregularities in thickness. The row of rollers I2 is mounted immediately above roller l0, and the row of rollers I3 is mounted immediately above roller II. The sheets pass between the upper and lower rollers, and the upper rollers I2 and I3 are adjustably mounted so that the normal space between the upper rollers and the lower rollers may be accurately determined and set in accordance with the thickness of the paper desired to be accepted. The upper rollers each have a pulley and belt connection (I4) with an arm I5 carrying a contact member I6. This contact member is arranged to descend into a mercury cup I! to close a circuit whenever the upper rollers are rotated sufficiently to cause the required displacement of arm I5. Springs I9 are of such strength as to oppose minor oscillations of the contact arms II. In adjusting this mechanismupper rollers I2 and I3 are positioned in such relation to the companion rollers III and II that the arms I5 will not oscillate sufficiently to close any of the contacts Iii-i1 when a sheet of the normal desired thickness throughoutpassesmemeen the rollers II! and I2 and II and I3. This inechanism is capable of measuring the thickness of sheets within one to two hundredths of a millimeter with the testing of paper of good quality.

A sheet which is defective because of being too thick or because of the presence of some foreign material therein will engage rollers I2 and I3, or either of them, suihciently to overcome spring I9 and cause enough oscillation of at least one of contact arms I5 to close contacts I6I|. It will be understood, of course that the contacts IIi-I'l are all connected in parallel. This establishes a circuit through line 20, which energizes magnet 2I and attracts armature 22, causing the closing of contacts 23 and 24. Contacts 23 are included in a stick circuit through which current flows from line 25, through line 26, contacts 23, magnet 21, line 28, and normally closed contacts 29, to ground. Contacts 29 are mounted upon a lever 30 which is actuated by a pin 3|, and the stick circuit will remain closed until the lever is rocked and contacts 29 are opened. Meanwhile contacts I6Il will have opened through the action of springs I9 upon the passage of the defective sheet beyond the upper rollers.

The energization of magnet 21 in the stick circuit causes current to flow from, line 25, through line 25, contacts 24, line 32, magnet 33 toground. .This magnet operates to displace armatures in the form of plungers or pins mounted upon a rotating disk 35a which is part of a. rotary relay (Figs. 4, 5 and 6). The rotation -of Two of these rollers I0, II-

to their normal conditions after the relay has been actuated to cause rejection of defectiye sheets after they have advanced to a predeter mined station in the machine. The pins 36a are the armatures of the rotary relay and they are mounted in the disk 35a in such a manner that they may be displaced laterally by means of the magnet 33, Figs. 4, 5 and 6.

In the embodiment of the invention illustrated, there are four pins 360 equidistantly spaced about the circumference of the disk and the rotation of disk 35a is such that it will turn a quarter of a revolution for each sheet introduced into the machine. In addition to the left hand rotary relay in Fig. 1, there are three other rotary relays which are provided for purposes to be described hereinafter. For convenience the four rotary relays are driven from a common shaft which is geared in timed relation with the sheet-advancing rollers of the sorting machine.

As illustrated in Figs.4, 5. and 6, the disk 35a of the rotary relay is mounted upon a shaft 38 which carries a bevel gear 39 in engagement with a bevel gear 40. As indicated hereinabove, bevel gear 40 is mounted upon a common shaft 31 which is drivn in synchronism with the driving rollers and paper feeding mechanism of the machine.

When magnet 33 is energized, it causes one of the pins 36a to be displaced axially or extracted from its normal position, Fig. 5, so that as the disk 35a rotates clockwise the pin will strike pin 3| and displace it to cause the opening of the normally closed contacts 28.

The pin is retracted'to its normal position by means of a cam 4| which is carried by an arm 42. Just before the pin reaches cm H it comes opposite pin 43a having a cam surface 44 by which the pin 43a is raised as the head of pin 36a passes by. Displacement of pin 43a closes the normally opencgntacts 45. Contacts 45 and their operating pin 43a also are mounted upon arm 42. This arm has a hub 46 by which it is supported upon a boss 46a secured to the stationary frame of the machine. Hub 46 is provided with a pair of set screws 41, 48 by which the arm may be fixedly positioned in any desired position of adjustment.

The angular adjustability of arm 42 is to enable caused functioning of the rotary relay. The timing of the cycleof operation is referred to the forward or advance edges of the sheets of paper which pass through the machine, and as will be explained hereinafter, contacts 45 are so positioned as to cause deflection of the forward edge of a defective sheet from the path of travel of normal sheets when the defective sheet reaches station A, Fig. 2.

Referring again to the energization of magnet 33 because of the passage of a sheet faulty in thickness between rollers III and I2 and rollers II and", the energization of the magnet will cause the extraction of an armature pin 36a so as to project the head of the pin in the path of pin 31, and thereby cause the armature pin to open contacts 2!. The opening of contacts 28 de-energizes the stick circuit and magnet 21 and causes the release of armature 22, therebyresetting the same to be ready for re-operation upon the passage of another defective sheet between rollers l0 and I2 and II and I3.

When the extracted pin 350 will have reached cam 44 and contacts 45'the defective sheet which caused the extraction ofthe pin will have advanced to station A, and when the extracted pin a strikes cam 44 it will cause the closing of contacts 45, with the result that current will flow. from line 25, through line 52, contacts 45, line 53, magnet 54 to ground, Fig. 2. The energization of magnet 54 will actuate valve 55 and permit the passage of compressed air through openings 55 upon the lower side of a pipe 51 which extends across the machine.

Valve 55 is at station A an the opening of the valve is timed to divert the ront edge of the defective sheet downwardly so that it will come between a pair of endless belts 5s, 59 by which the defective sheet is directed to a receiver in which the sheets are collected. Compressed air is emitted from the openings 55 onlyso long as the extracted pin 35a remains in contact with the cam surface 44 which is made sufliciently long to assure the rejection of a defective sheet.

When the pin isretracted by the cam 4| the contacts 45 are opened under the action of their spring and this results in immediately de-ener-, gizing magnet 54, with the result that valve 55 closes and theemission of compressed air is coneluded. Thereafter all normal sheets may pass beyond station A. Y

The sorting and rejecting of sheets which are either too long or too short is accomplished by devices capable of adjustment for different lengths of sheets and capable of ascertaining whetherthe sheets are of the desired lengths within any desired tolerance. Referring to Figs. 1, 21 and 22 this mechanism includes an endless wire screen 55 which is driven by driving rollers 5|. Screen carries the sheets and the first roller over which the sheet passes is roller 52, which is rotatably mounted in the frame of the machine at right angles to the path of travel of the sheets.

Two groups of rollers 53, 53a cooperate with the roller 52. The axes of the rollers of the group of rollers 53a are alined with the axes of the rollers of the group of rollers 53-(the two groups of rollers 53 and 53a being shown'offset in Fig. 1 merely for clarity in illustration in the wiring diagram). The rollers of the group 53a alternate with the rollers of the group 53 in ,an axial direction,i. e. the rollers of group 53a are interposed or sandwiched between the rollers of group 63. The arrangement of the rollers may be understood from Figs. 22 and 21 in which a few of the rollers are shown.

The main frame of the machine also carries a set of rollers 52a spaced from rollers 52 a dlstance equal to the length of the sheets desired to be sorted. The distance between rollers 52a and 52 is adjustable to the desired length of the sheets.

Bearing upon screen 60 and above rollers 82a there are two groups of rollers 54, 55, so arranged that the rollers 54 ofone group are just ahead of the rollers 65 of the other group (the separation being exaggerated in Fig. 1 for clarity in illustration), and the rollers of one group are alternately arranged with the rollers of the other group across the machine. The spacing, in the direction of travel of the sheets, between rollers 54 and 65 is equal to the permissiblet lerance in length of the sheets to be accepted.

' This tolerance is adjustable as desired.

There are as many rollers 54 and 55 asthere direction of travel of the sheets.

1 8| and cause the same to close contacts 82.

are disconnected from the electrical, circuit or temporarily removed from the machine so that only such rollers as may be contacted by sheets of the desired normal width will be operative to efiect control of circuits about to be described.

Suitable provision is made for adjusting the distance between rollers 52 and 52a, for enabling the machine to handle sheets of different lengths. Referring to Figs. 21 and 22 it will be seen that roller 52a and rollers 54 and 55 are mounted upon a carriage 55 which is slidable parallel to the Manipulation of screw 61 by hand wheel 58 effects displacement of the carriage.

The controlling circuits are operated as follows: When a sheet of normal length is carried along upon the screen 5ll, rollers 53 and 64 are raised together at the same time; this results in breaking the two contacts which rollers 53 and 64 normally make with the screen. Prior to the breaking of these two contacts current flows from line 25, through line 10, contacts H, magnet 12, line 13, from which it is divided and flows through lines 14 and 15 to rollers 53 and 54, respectively,

to screen 50 and toground. The breaking of this normal conditions with magnet 12 energized,

magnet I8 is energized and causes the extraction of pins 36b as they pass the magnet. Hence if sheets are not faulty because of being too short, magnet 18 will not extract any pin 35b passing by. 1.

' With contacts I6 open and magnet 18-daenergized, pin 35b is not extracted. Pin 35b is accordingly left in its retracted position, as shown in Fig. '7. In this position it will strike an arm The closing of contacts 82 causes current to flow from line 25 to line 10, magnetv 83, contacts 82 to ground, thereby re-energizing magnet. 83 and causing attraction of armature 11. This results in resettting the circuits and causing the re-energization of magnet 18 in time for the testing of a following sheet. The pin 36b being retracted does not engage pin 43b when the same comes opposite contacts 85 and consequently conair from openings 88 at the, under side of pipe 89 so that a normal sheet which is not faulty because of being under length may pass beyond rolls 90, 9i. I

If a sheet carried upon metallic screen 55 is too short to simultaneously break both of the contacts between rollers 53 and the screen and roller 54 and the screen there will be no interruption of the normal current flow from line 25, through line 18, magnet 12, line 13, and through eitlirline 14 or l5--(depending upon whether the sheet is beneath rollers 53 or rollers 64) with the result that contacts 15 remain closed and maintain magnet 18 energized. As pin 88b passes magnet I8 it is extracted by the attraction of the magnet and the rear end of the pin is drawn forward so that it does not strike arm 8| of contacts 82, Figs. '7 and 8. This is of no consequence in this particular operation, because armature I1 is already attracted and contacts I8 will remain closed under the influence of normally energized magnet I2.

When the extracted pin 88b has rotated to opposite contacts 85 it will strike pin 48b and cause the closing of contacts 85, thereby causing current to flow from line 25, through line 52, contacts 85, line 93, magnet 86 to ground. At this moment the forward edge of the short sheet will have arrived at station B and the actuation of the magnet 85 will cause the opening of valve 81 and the emission of compressed air through openings 88 in pipe 89. The defective sheet will be deflected downwardly before it reaches rollers 98, 8|, and will come into engagement with the endless belts 85,, 88. These belts deliver and collect the short sheets in a by a cam similar to cam ll and in the manner already described.

If the length of a sheet is greater than the normal length desired, it will cause the simultaneous breaking of contacts between rollers 58a and screen 68 and rollers 55 and screen 88. But when normal sheets pass, only one of the two contacts at rollers 88a and 88 is opened at one time, and current flows from line 25 through line 98, armature II8, contacts 88, magnet I 88, line I8I, either branch line I82 or branch line I88, through rollers 63a or 85, to screen 88 and ground. The opening of this circuit at rollers 88 and 85 at the same time causes the de-energization of magnet I88, the releasing of armature H8, and the closing of contacts I88. Closing of contacts I 84 establishes a circuit from line 25, through line 98, armature IIO, contacts I88, magnet I55, to ground, with the result that the magnet I extracts a passing pin 35c so that this pin may strike pin 830 to cause closing of contacts I88 and the rejectionof the long sheet which caused the simultaneous breaking of contacts of the two groups of rollers 88a and 55 with screen 88.

In order to establish normal conditions of the circuits to .enable control by a following sheet, contacts I88 are provided with an arm I 8I which is in the path of the head of the extracted pin 360 so that the contacts will be temporarily closed as the pin passes by, Fig. 9. This causes current to flow from line 25, through line 88, magnet I88, contacts I88 to ground, thereby resetting armature I I0, closing contacts 88 and opening contacts I88. With magnet I85 de-energired, the revolving relay pins 860 will remain in retracted position until a following sheet appears which is sumciently long to simultaneously break contacts which rollers 83a and 85 make with screen 88, to cause the release of armature II8. As in the other rotating relays, the pins 88c are retracted by a cam as they pass the cmtacts I88.

By the time contacts I85 are closed by an extracted pin 880, the defective sheet which brought this about will have arrived at station C, Fig. 2. Upon the closingof contacts I88T'a circuit. is established from line -28 through" line 52, contacts I88, line II2, magnet II8, to ground. Magnet II8 controls valve H8 and when the magnet is energized, compressed air is emitted from opening H8 in pipe II8 to cause downward deflection of the forward edge of the sheet previously determined to be overlength. The forward edge of the sheet is deflected downwardly before it reaches rolls H1, H8 and it is directed to a collector by means of an endless belt IIS. As in the cases of valves 55 and 81, valve H8 is opened only sumciently long to accomplish rejection of the defective sheet.

As I previously explained, if the sheet is of normal length, the normally excited circuit through line I8 will be broken and the normally excited circuit through line III will remain excited so that in this case the normal sheet will not be rejected at either station B or station C and will continue on through rollers I I1 and H8 of the machine.

The sheet is then tested for the presence of any irregularities aflecting opaqueness, such as blemishes,'stains, creases, folds and spots, and for width. Upon leaving the rollers Ill and H8 the sheet passes upon av smooth surface such as may be provided by a hard table top I28, Figs. 2, 10, 11 and 12. This-table top has a slot I2I transverse to the direction ofmovement of the sheet.

Slot I2I is suillciently long to extend beyond the edges of the widest sheet which the machine is built to handle, and the length of the slot may be varied by means of shields I22, I23 at each end of the slot. These shields are provided with nuts I24, I25 in engagement with a left and right hand screw I25 by which the shields may be brought closer together or separated to adjust the length of the slot to the width of the sheets being sorted and tested.

The opacity of the sheets and the presence of holes is determined by the intensitiesof light rays passing through the slot I2I. The light rays aifect a number of photo-electric cells which are connected in parallel and the combined intensity of the light striking the photo-electric cells determines the opacity of the sheets within a desired tolerance. The presence of any holes or creases and the presence of any blemishes or stains, or the presence of a sheet of paper which is too narrow to cover the entire length of slot I2I, permits the passage of too much or too little light to the photo-electric cells, with the result that circuits are placed into operation which cause the rejection of the defective sheets. Just above the slot I2I there is a row of projectors I28, and beneath the slot there is a row of lenses I28 and a row of photo-electric cells I88. Under normal conditions when there is no sheet passing over the slot there is interposed between the projectors and the photo-electric cells a shutter I8I which prevents light from reaching the photoelectric cells. The whole device is placed under a hood so as to operate as much as possible in darkness. The following mechanism is provided for displacing the shutter when a sheet covers the slot during its passage through the machine. Upon each side of the slot there is a mercury contact member I82, I88, each having an arm 8 extending into the path of the moving sheets. With no sheet present the contact members are in circuit and current flows from line 25, thrBugh line I88, magnet I88, line I81 and through contact members I82 and I88 to ground. In this condition magnet I88 isrenergized and contacts I88 are open. Preferably, the arms I 88 of contact members I82 and I88 are placed as close to the slot III as is practical. when a sheet covers the slot I2I and extends beneath both contact arm I69 of contacts I66. If desirable a stick cirmembers I32 and'I33, line I31 is opened and magnet I36 is de-energized with the result that armature I39 is released and contacts I38 are closed. The closing of contacts I38 establishes a circuit from line 25, through line I35, contacts I38, a

pair of shutter operating magnets I40, I, to

ground. The energization of magnets I40, I and the attraction of their corresponding armature effects the displacement of shutter I3I from its normal position and permits the passage of light from the projectors to the photo-electric cells I36.

The immediate result of the passage of light through the paper causes the milliampere sensitive relay I46 to be affected in accordance with the intensity of the light striking the photoelectric cells. In the event that the sheet being tested is normal, the needle I41 of the sensitive relay will assume the position previously determined for the degree of opacitydesired in a normal sheet, or will be deflected because of excessive light or insuflicient light. If the defeet is of such a nature as to warrant the rejec- .tion of the sheet being tested, the needle will be deflected sufficiently to close either of the contacts I48 or I49, thereby closing a circuit which causes flow of current from line 25, through line I35, line I43, magnet I50, contacts I48 or I49, needle I41, line I5I and contacts I52, which have been previously closed by the energization of magnet I40, to ground. The spacing of contacts I48 and I49 determines the permissible tolerance in the quality of opaqueness.

The energization of magnet I50 attracts armature I53 and closescontacts I54. so that a stick circuit is established from line 25, through line I35, line I43, contacts I54, magnet I 55, line I 56, and the normally closed contacts I51 to ground. The stick circuit will remain closed until contacts I51 are opened by the action of a pin 36d. The actuation of armature I53 also results in closing contacts I59 and the establishing of a circuit from line 25, through line I35, line I43, contacts I59, line I60, magnet I6I to ground, thereby causin the extraction of a pin 3641 as it comes to a position opposite magnet I6I. After. the pin has been extracted it comes into contact with rod I62 and operates the same to open contacts I51, thereby opening the stick circuit I56 and (is-energizing magnet I55. This releases the armature of magnet I55 which returns to its normal position where it remains until another defective sheet comes over slot I2I.

When the extracted pin 36d p'asses pin 43d it actuates. the same and causes contacts I63- to close, thereby establishing a circuit from line 25, through line 52, contacts I63, line I64, magnet I65, normally closed contacts I66 to ground. This occurs when the sheet determined to be defectiveon account of holes, improper opaqueness, or on account of being too narrow, reaches the approximate position of gate I61. Under the influence of magnet I65 gate I61 operisin time to deflect the forward edge of the defective sheet into the chute I68. Contact member I66 is so located that a sheet entering chute I68 will have passed the gate before the forward edge of the sheet will have contacted with arm I69 of the contact member to break contacts I66. The length of the cam surface on pin 43d of the fourth rotary relay must be such as to maintain contacts I63 closed and magnet I65 energized long enough to permit the sheet descending through chute I68 to have cleared gate I61 before its forward edge strikes cult for magnet I65 may be provided.

, It will be understood from the foregoing that when a normal sheet passes over table I and no defect in the quality of opaqueness is found therein, the-milliampere sensitive relay I46 will not be affected to the extent necessary to actuate relay I50, and contacts I59 will not be closed so that gate I61 will not be displaced from its normal position, and the tested sheet, will continue on through the machine.

The sheets are next tested for colorand shade, and for this purpose the following mechanism is provided. After a sheet has passed through rollers I15, its front edge comes into contact with an arm I16 of contact member I11. Contacts I11 are normally closed and current flows from line 25, through line I35,magnet I18,line I19, through branch lines I80 and I8I and through contacts I11 and I82, respectively, to ground. Upon the opening of both contacts I11' and I82 by a moving sheet, magnet I18 will be de-energized and contacts I83 will be closed, thereby setting up a circuit from line 25, through line I35, contacts I83,

line, I86, magnet I81, to ground, Figs. 2, 13 and Upon displacement of shutter I88 contacts I94 I close. These are connected with one side of milliampere sensitive relay I96 which is under the influence of photo-electric cell I90.

If the shade of a paper is normal-the needle I95 of the sensitive relay I96 will not be displaced sufliciently to cause the relay to operate controlling circuits, but if the sheet is lighter or darker than the shade desired, needle I95 will come against one or the other of contacts I91, I98, and will establish a circuit from line 25, through line I99, magnet 260, either contact I91 or I98, needle I95, line 20I, contacts I94, to,

ground. This results in actuating armature 202 and in closing contacts 203, thereby establishing a stick circuit from line 25, through line I 99, contacts 20.3, magnet 204, line 205, contacts I66, to ground. Contacts 201 are also closed upon the actuation of the armature 202 and a circuit is established from line 25, through line I99, con tacts 201, line 208, magnet I65, and contacts I66 to ground. The energization of magnet I65 opens gate I 61 and permits the oncoming sheet to enter chute I68. Magnet I65 will remain energized so long as contacts 203 and contacts I66 are closed. Upon theopening of contacts I66 by the forward edge of the rejected sheet of paper, magnet 204 and magnet I65 are de-energized. This permits the return of the gate I61 to its normal closed position. Upon de-energization of magnet 204, armature 282 returns to normal position and contacts 203 and contacts 201 are opened.

The normal sheets of paper which pass beyond gate I61 are delivered-to a pair of rollers 2I5, Fig. 2. These rollers are driven at a constant speed by some such means as a synchronous motor 2 I6. {A constant speed motor is provided in order to insure that all the sheets delivered from the ellers 2I5 will be given the same velocity. The

iven sheets descend upon the incline 2I6a and are thrown against a set of hooks 2, Figs. 3, 15 and 17. These hooks are carried upon a weighing device comprising alight frame having a pair of aluminum bars 2l8, 2!9 extending transverse of the machine and supporting hooks 2!1 in the path of the advance edge of the oncoming sheet. This frame is supported upon bearings 220 and the arrangement is suchthat the impact of the oncoming sheet will cause the frame to be pivoted upon its bearings an amount proportional to the weight of the sheet.

The frame is provided with an indicator 22'! which is adapted to contact switch operating elements 222 and 223 disposed in the path of movement of the indicator. The frame, indicator and hooks are counterbalanced by means of a weight 224 and the positions of the contacts operating elements 222 and 223 are such as to effect control of circuits for accepting sheets of normal weight and for rejecting sheets which are either too light or too heavy.

The weighing apparatus must first be adjusted in order to take proper weight measurements of the sheets passing through the machine. The distance of the rollers 2!5 from the hooks 2|1 should be just a little greater than the length of the sheets being tested. The rollers 215 and motor are so mounted upon frame members 221 as to enable the positioning of the rollers at the desired distance from the hooks 2". The frame members are engaged by screws 228 and a cross shaft is geared to the two screws. The cross shaft has a hand-wheel 223 for operating the screws for moving the frame members and rollers.

The incline 2!6a is provided with guide rails 232, one at, either side of the incline. These guide rails are adjustable laterally in accordance with the width of the sheets of paper.

Since the velocity of the oncoming sheets is maintained constant, the deflections of the hooks 2!1 and of indicator 22! will be in proportion to the relative weights of the sheets. The sheets are thrown against the hooks 2" of the balance and the deviations of the indicator may be noted. In adjusting the weighing apparatus the switch op-, erating arm 222 must be so placed that it will always be actuated by the indicator 22! when a sheet of normal weight strikes the hooks 2H, and the switch operating arm 223 must be so positioned as to be actuated by the indicator 22! only when sheets of too great weight strike the hooks 2". The counterweight 224 is positioned upon its supporting rod for the purpose of obtaining the proper regulation of the weighing apparatus. The general regulation of this apparatus can be completed by noting the swing of the indicator during a trial made with sheets which have previously been weighed.

Testing for weight is accomplished in the following manner. When a sheet strikes the hooks 2! 1, the indicator 22! is displaced from its normal position, thereby permitting switch 236 to open under the influence of its spring 235. The opening of switch 236 opens the circuit including the normally energized magnet 231, Fig. 3, which releases armature 238. Armature 236 carries contacts 239 which engage contacts 246 after the lapse of a period of time dependent upon the adjustment of dash-pot 24!. Prior to the closing of contacts 239, 240, the indicator 22! will have actuated the switch operating arm 222 for switch 243, if the sheet weighed exceeds the required minimum weight. This will have resulted in opening the circuit through relay 244 which is normally energized because of current flowing from line 25, through contacts 245, magnet 244, line 246, switch 243, to ground. Upon opening of contacts 243, armature 268 of relay 244 is released and contacts 246a are opened thereby de-energizing the circuit including line 243 and magnet 250. This results in closing valve 25! so as to cut off the emission of compressed air from pipe 252 so that the sheet of normal weight which has brought this condition about may pass on beyond the pipe.

The dash-pot 24! delays the closing of contacts 233240 for a suificient period of time to enable the indicator 22! and hooks 2 !1 to complete their swing. The closing of contacts 239-240 establishes a circuit from line 25, through contacts 239-240, magnet 254 to ground, thereby attracting armature 255 and closing contacts 256. The closing of contacts 256 establishes a circuit from line 25, through contacts 256, line 251, magnet 258 and ground. Magnet 258 operatesupon an arm 259 connected to a pivoted frame 260 which carries fiber rolls 26! disposed between hooks 2 !1 of the weighing mechanism. The rollers, when actuated by magnet 258, lift the forward edge of a sheet of paper so as to release it from the hooks, and directs it towards the endless belts 262.

The endless belts 262 carry a sheet to the endless belts 263 if the sheet is of the desired weight because in that case the flow of compressed air from pipe 252 will have been discontinued, as already explained.

If the sheet is underweight so that the indicator will not have actuated the switch actuating arm 222, switch 243 will have remained closed and the compressed air issuing from pipe 252 will not have been shut off. In that case the compressed air would reject a sheet and cause the same to be deflected to a conveyor 264.

A sheet which is not underweight will have caused the discontinuance of the flow of compressed air from pipe 252, as just explained, and the sheet will be carried upwardly between endless belts 263. An arm 266 of switch 265 is so positioned as to be actuatedby a sheet being carried between belts 263 to establish a circuit from line 25, through magnet 261, switch 265 and ground. This causes actuation of armature 268 and resets the relay with contacts 245 and contacts 246a closed, thereby actuating magnet 25!! and valve 25! to again turn on the flow of compressed air from pipe 252. So far as valve 25! is concerned it is ready to be controlled by a following sheet.

When the indicator 22! returns to its normal position it will cause the closing of switch 236, with the'result that magnet 231 will attract armature 238 and open contacts 239240. This causes de-energization of magnet 254 and the opening of contacts 256, with the result that magnet 258 is also de-energized and the fiber rollers 26! are permitted to drop to normal position.

It will be recalled that the switch operating arm 223 is so positioned in the path of travel of the indicator 22! that the arm 223 will be actuated whenever sheets of too great weight strike the hooks 2". Switch 216 is normally open and when the indicator 22! has swung sufliciently far to strike arm 223, switch 210 will be closed, therby causing energization of magnet 21!.- This results in closing the stick circuit from line 25, through contacts 212, magnet 213, switch 214 to ground. At the same time, contacts 215 are closed, so that when the sheet of paper arrives opposite normally open switch 216 it will cause the closing thereof by'striking against the switch arm 211, and a circuit will be established from line 25, through contacts 215', switch 216, magnet 218 and ground. Magnet 218 opens valve 219 which causes the issuance of compressed air from pipe 289.

Compressed air deflects the overweight sheet that it will be closed only long enough to initially establish the stick circuit through magnet 213. From the foregoing it will be understood that a sheet which is to be rejected because of being too light will not cause the opening of switch 243,

and that if a sheet is of normal weight or overweight, circuits which are under the control of swifch 243, are brought into action, with the result that he flow of compressed air from pipe 252 is discontinued, and that if the sheets are overweight, switch 210 will be closed, with the result that the overweight sheet will be rejected by a blast of compressed air from pipe 289.

The sheets which have passed through the machine leave the belts 281 and are deflected be-.

tween rollers 285, 288. Roller 286 is a metallic roller and is grounded. Roller 285 is insulated and has a slip-ring which continuously engages contact 281 so that when no paper is present between the two rollers, current flows from line 25, through magnet 288, contacts 281,-the slip-ring on roller 285, roller 288, to ground. Whenthe circuit is broken by the passage of a sheet of paper between rollers 285 and 286,-the normally energized magnet 288 is de-energized and counter 289 is actuated. The counter may be of any usual type by which the total number of sheets passing through the machine may ,be kept track of. A relay may be provided to stop the machine, or to deliver from the discharge station a predetermined number of sheets; when the counter has counted a predetermined number of sheets, say five hundred.

It is to be understood that the various relays and switches are such as to be sensitive enough to cause immediate energization or de-energization of .the various circuits. ,Several of the switches have been illustrated as mercury, cup switches and this type is satisfactory, although I desire it to be understood that any switches which are sufiiciently sensitive and which may be easily adjusted, may be used. The switches, relays, contacts and other electrical apparatus are shown merely in an illustrative manner.

In Fig. 16 I have shown an enlarged detail of switch-243, Fig. 15. This switch is of a common type in .which mercury is used in making and breaking contacts and which consists principally of a cylinder 291 mounted for oscillation upon a .bearing 292. The cylinder has an arcuate' chamber 293 which'contains mercury 294 at a level enabling the bridging of terminals 295 and 295. As illustrated in Fig. 16 the mercury bridges the gap between contacts 295 and 298; When the cylinder is displaced upon its axis by the indicator 221, Fig. 15, terminal 296 is raised above the level of the mercury 294 with the result. that the electrical connection between the two terminals is broken. The limit of oscillation of the cylinder 291 is'determined by a pair of set screws 291, 298 which engage a lug 299 carried by the cylinder.

Referring to Fig. 15, for the normal setting of switch 243 the set screws 291, 298 are so adjusted that the gap between theterminals 295 and 296 is bridged by the mercury, and for the normal setting of switch 219 the setting of the set screws 291, 298 is such that the mercury doesnot bridge the gap between the two terminals, as has been previously explained. Switch 243 and switch 210 are provided with arms 222 and 223 respectively by which they are displaced from normal position when contacted by indicator 221. ,Each of these arms 222 and 223 is provided with a oneway hinge 399, Fig; 16, which will permit the return of indicator 221 to its normal position without rocking the switches 243 and 210. The hinges permit the ends of arms 222, 223 to swing to the left, Fig. 15, relative to switches, but they do not permit pivoting of the ends of the arms 222 and 223 relative to the switches when the indicator 221 comes in contact'therewith when moving toward the right, F g. 15.

The bearings of the switches 243 and 210 are supported by a rail 302 which is arcuate in respect to the axis of oscillation of the indicator 221. This rail enables the positioning and spacing of the switches 243 and 210to bring about- 396 is provided for adjusting the sensitivity of this contact member. 'Wire 3111 may be bent in any direction in which it is desired to extend the same in order to reach into'the path of a mov ing sheet. f

In Figs. 19 and 20 I have illustrated enlarged views I of the thickness measuring mechanism which the sheets come into contact with when they first enter the machine. The operation of this mechanism has been explained in connection with the showing of the same in Fig. l. The rollers 18 and 11 are mounted in the main frame of the machine. The group of rollers 12 and 13 are carried in auxiliary frames 309 and 319, respectively. These frames are so mounted upon the main frame that they may be raised or lowered individually to control the spacing between the rollers 12 and roller-111, and between the-rollers 13 and roller 11.

Both of the auxiliary frames are alike and are adjusted in the same manner so that an understanding of the construction of one will sufiice. Each frame is supported by four elevating screws 311, 312, 313, 314, Fig. 20, which are in threaded engagement with tapped holes in the main frame, in the manner illustrated at 311, Fig; 19. The

auxiliary frame carries a pair of shafts 315, 316.

supported thereby may be raised or lowered to the desired adjustment.

Each roller of the two groups of rollers i2 and I3 is individually supported in its auxiliary frame by a pair of members 324 which are pivoted at 325. The other ends of members 324 are sup-' ported by bolts 326,and. spring 321. The bolts and the springs permit individual adjustment of the tension in belts l4.

In Figs. 21 and 22 I have shown a manner of mounting rollers 64 and 85 upon a carriage 66 whereby they may be positioned in accordancev with the length of the sheets desired. Carriage 65 includes a channel iron 61 to which the roller supporting members 68 are secured. Some such means as a slot and pin connection may be provided for enabling individual adjustment of the rollers 64 and 65. Each pin and slot connection includes a bolt 328 and a slot 329 whereby the spacing between rollers 64 and 65 may be adjusted to any desired tolerance.

According to the present invention provision is made for feeding sheets in succession from a supply stack at a supply station to a discharge stack for normal or standard'sheets at a discharge station. Intermediate said stations, provision is made for testing and rejecting sheets which vary from a requisite standard. 'Each sheet, while it is in motion, will be tested for thickness, thereafter for under-length and/or overlength, then for visual characteristics such as blemishes, holes, creases, crumpling, tearing, stains or for narrowness of width and for color. Color testing is effected separately but sheets rejected for color variation go to the same reject station which receives reject sheets rejected for other visual characteristics. Finally there -is testing and rejection of sheets for overweight and/or under-weight. Sheets which pass all of the tests pass through the entire machine and are counted and delivered to the discharge stack for standard sheets. All testing and rejecting and .diverting is effected with the sheets in motion and certain testing operations are performed concurrently upon different sheets. The test ing is effected successively and reject stationsare provided for sheets which vary from standard thickness; for length two stations are provided for receiving respectively short and long sheets; a single reject station is provided for sheets which'are visually tested; and two reject stations are provided to receive respectively. underweight and over-weight sheets. While a common reject could be provided for all nonstandard sheets the separate stations are of particular utility in segregating the defects. For

1 example, sheets yvhich-are too short can be reclaimed for'a shorter standard length, likewise over-weight and under-weight sheets may be of themselves saleable in different weight classifications.

What is claimed is: I 1. In a machine for sorting sheets of paper or the like, the combination comprising driving rollers for advancing sheets through the machine, rollers cooperating with certain of said driving rollers for testing the thickness of the sheets, said rollers being disposed across the entire width of the sheets being tested, circuits operated vby said last named rollers for causing the rejection of sheets having detects causing 'excessive thickness, a screen passing over certain *of said driving rollers, rollers cooperating with said screen for determining whether the sheets carried by said screen shallbe rejected because of length, means for rejecting the sheets having lengths outside of the tolerance allowed by said length-testing rollers, circuits under the control of said length-testing rollers for controlling the operation of said rejecting means, means for determining whether the sheet is of the desired opaqueness, means controlled by said last named means for rejecting sheets defective on account of opaqueness, means for determining the color and shade of a sheet, means controlled by said last named means for rejecting sheets having undesired color and shade, means for weighing the sheets as they advance through the machine, means for rejecting overweight and underweight sheets, and means for collecting the normalsheets which have successfully passed through the various tests.

2. In a machine for sorting sheets of paper or the like, the combination comprising driving rollers for advancing the sheets, means for testing the thickness of sheets passing through the ma chine, said means including a multiplicity of sensing rollers in spaced relation to the driving rollers and collectively arranged to sense the entire width of a passing sheet, and circuits controlled by the rotation of any one of said sensing rollers for causing the rejection of sheets defective on account of excessive thickness.

3. In a machine for sorting sheets of paper or the like, the combination comprising driving rollers, a metallic screen driven by said driving rollers and advancing sheets in the machine, means for determining whether a sheet upon the screen is of desired length, said means including circuit- .by said contact means for causing said rejecting means to reject from the machine all sheets 'which do not measure within the length and tolerance permitted.

4. In a machine for sorting sheets of paper or the like, the combination comprising driving rollers, a metallic screen driven by said rollers, two groups of aligned rollers normally engaging the screen, two other groups of rollers normally in engagement with the screen and spaced from said first named groups of rollers a distance approximating the length of sheets desired, means for rejecting sheets outside of the length and tolerancepermitted and outside of the lengths determined by said groups of rollers, and circuits controlled by the making and breaking of contact between said groups of rollers and metallic screen for controlling the operation of said rejecting means.

5. In a machine for sorting sheets of paper or the like, the combination comprising driving rollers, a metallic screen driven by said rollers and advancing sheets in a machine, a group of rollers-normally engaging with said' screen for the 6.. In a machine for sorting sheets of papers or the like, the combination comprising driving rollers for advancing sheets through the machine, a

metallic screen driven'thereby, groups of rollers normally in contact with said screen and spaced from each other a distance corresponding to the maximum permissible length of sheets, circuits including said groups of rollers for energizing means for rejecting oversize sheets, relays operable whenever a sheet passes said rollers which is sufficiently long to simultaneously break the contact between both groups of rollers and the screen, and means for rejecting sheets which are sufliciently long to cause the simultaneous breaking of the contacts between the rollers and the screen.

7. In a machine for sorting sheets of paper or the like, the combination comprising means for weighing sheets of paper in transit through the machine, means for imparting to said sheets of paper -a constant velocity and for directing said sheets of paper against said weighing means, means normally operative to cause the rejection of underweight sheets, and circuits controlling relays to interrupt the operation ofsaid rejecting means to permit passage of sheets through the machinewhich are determined by said weighing means to exceed the minimum weight.

8. The combination set forth in claim 7' in which means are provided to cause the rejection of sheets exceeding the maximum desired weight and in which is provided circuits controlling relays to operate said rejecting means upon the actuation of said weighing means by a sheet exceeding the maximum desired weight.

9. In a machine for sorting sheets of paper or the like, the combination comprising means for weighing sheets of paper in transit through the machine, means for imparting to said sheets a constant velocity and for, directing said sheets against said weighing means, means under the control of the weighing means to cause the rejection of sheets which do not come within the range of weight desired, and circuit controlling means for releasing a weighed sheet from the weighing means upon the conclusion of the weighing operation.

10. In a machine for sorting sheets of paper or the like, in combination, means for moving a succession of sheets through the machine and means for discharging at a discharge station only those of said sheets which have a predetermined standard density uniformly throughout each sheet, said last-mentioned means including devices for testing the .sheets of paper for thickness and opacity at every point on each sheet, for length at any point across the entire width of the sheet, and for weight, and means under the control of said devices for diverting sheets which are found by said devices to be non-standard as to thickness, length, opacity or weight, to prevent their discharge at the discharge station.

11. In a machine for sorting sheets of paper or the like, in combination, means for moving a succession of sheets through the machine and means .for discharging at a discharge station only those of said sheets which have a predetermined standard density and light-modifying character uniformly throughout each sheet, saidflast-mentioned means including devices for testing the sheets of paper for thickness and opacityat every point on each sheet, and for length, shade and weight, and means under the control of said deces diverting sheets i h are non-standard as to thickness, length, opac y, shade or weight,

to prevent their discharge at the discharge station.

12. In a machine for sorting sheets of paper or the like, in combination, means for testing the thickness of sheets at every point on each sheet, means for testing the length of each sheet, electromagnetically controlled devices for deflecting non-standard sheets, means for advancing successive sheets of paper through both said testing means in succession and normally thereafter past the deflecting devices to a discharge station, electromagnetically settable relay devices timed with the sheet advancing means for effecting delayed closing of circuits to the deflecting devices when. a sheet is advanced to the latter, circuits controlled by the thickness-testing means for setting a relay device in response to non-standard thickness at any point on the sheet, and circuits controlled by the length-testing means for settingother relay devices respectively in response to sheets shorter or longer than standard length, whereby the deflecting devices are operated to deflect sheets non-standard in thickness or length only when said sheets are advanced to said devices.

13. In a machine for sorting sheets of paper or the like, in combination, means for moving a succession ofsheets through the machine and means for discharging at a standard sheet discharge station only those of the said sheets which have standard characteristics, said characteristics including a uniformly even and unblemished surface, said last-mentioned means including a device for testing the moving sheets of paper for thickness at everypoint on each tested sheet to detect uneven spots and blemishes thicker than the standard sheet thickness, a device for testing the moving sheets of paper for opacity at every point on eachtested sheet to detect uneven spots and blemishes which differ in opacity from the standard sheet opacity, and means under the control of said devices for diverting sheets found to be non-standard in thickness or opacity, to prevent their discharge at the discharge station,

14. In a machine for sorting sheets of paper or the like, in combination, means for moving a succession of sheets through the machine, and means for discharging at a'standard sheet discharge station only those of the said sheets which have a standard average density intermediate their surfaces, said last mentioned means including adevice for testing the moving sheets of paper for thickness at every point on each tested sheet, a device for testing the moving sheets of paper for weight, and means under the control of said devices for diverting sheets found to be non-standard in thickness or weight, to prevent their discharge at, the discharge station, said weight testing device comprising means directly responsive to the momentum of a moving sheet .means for discharging at a standardsheet discharge station only those of the said sheets which have a standard average weight per unit of length intermediate their ends, said last mentioned means including a device for testing the moving sheets of paper vfor length to detect sheets for weight, and means under the control of said devices for diverting sheets found to be nonstandard in length or weight, to prevent their discharge at the discharge station, said weighttesting device comprising means directly responsive to the momentum of a moving sheet and means for delivering sheets of standard length to said momentum-responsive means with a predetermined uniform velocity,

16. In a machine for sorting sheets of paper or the like, in combination, means for moving a. succession of sheets through the machine, and means for discharging at a standard sheet discharge station only those of said sheets which are of standard weight uniformly distributed at every point on each sheet, said last mentioned means including a device for testing the moving sheets of paper for opacity at every point on each tested sheet, a device for testing the moving sheets of paper for weight to detect sheets having a total weight differing from the standard total weight, and means under the control of said devices for diverting sheets found to be nonstandard in opacity or weight, to prevent their discharge at the discharge station.

-l7. In a machine for sorting sheets of paper or the like, in combination, means for moving a succession of sheets through the machine,-and means for discharging at a standard sheet discharge station only those of said sheets which have all of their dimensions of a predetermined standard for each dimension, said last mentioned means including a device for testing the moving sheets of paper for thickness, a device for testing the moving sheets of paper for length, and a device for testing the moving sheets of paper for opacity at every point across each tested sheet, said opacity testing device including means responsive to non-standard transmission of light occasioned by a sheet of non-standard width, and means under the control of the aforesaiddevices for diverting sheets found to be non-standard in thickness, length, or width, to prevent their dis- 7 each tested sheet, and devices for testing the moving sheet of paper for length and weight, and 1 means under the control of said thickness, length,

and weight testing devices for diverting sheets which are non-standard as to thickness, length or weight, to prevent their discharge at the discharge station. I 1

19. In a machine for sorting sheets of paper or the like, in combination, means for moving a succession of sheets through the machine, and means for discharging at a standard sheet discharge station only those of said sheets which are of standard weight uniformly distributed at every point on each sheet, said last mentioned means including devices for testing the moving sheets of paper for thickness and opacity at every point on each tested sheet, and a device for testing the moving sheets of paper for weight to detect sheets having a total weight differing from the standard total weight, and means under the control of said devices for divertingsheets found to be non-standard in thickness, opacity, or weight, to prevent their discharge at the discharge station.

20. In a machine for sorting sheets of paper or the like, in combination, means for moving a succession of sheets through the machine, and means for discharging at a standard sheet discharge station only those of the said sheets which have a predetermined standard density t every point on each sheet, said last mentioned eans including devices for testing the moving sheets of paper for length, opacity, and weight, and means under the control of said devices for diverting sheets found to be non-standard in length, opacity, or weight, to prevent their discharge at the discharge station, said opacity testing device being sensitive to non-standard opacity at any point on each sheet, and said weight-testing device com,- prising means directly responsive to the momentum of a moving sheet and means for delivering sheets of standard length to said momentumresponsive means with a predetermined uniform velocity.

21. In a machine for sorting sheets of paper or the like, in combination, means for moving a succession of sheets through the machine and means for discharging at astandard sheet discharge station only those of the said sheets which have uniform characteristics of thickness, length, opacity, and weight, said last-mentioned means including circuit-controlling devices for testing the sheets of paper for all of'said characteristics, and means controlled by electrical circuits under control of the testing devices for diverting sheets non-standard as to each of said characteristics to prevent their discharge at the discharge station, said thickness and opacity testing devices being sensitive tonon-standard conditions at any point ,the sheet of paper.

22. In a machine for sorting sheets of paper or the like, the combination comprising paperweighing means having a device which is directly responsive to the momentum of a moving sheet of paper and which has means for receiving and supporting a sheet of paper delivered endwise thereto, means for delivering successive sheets of paper endwise to the momentum responsive de-' vice of the weighing means with a predetermined uniform velocity, and means for conveying the successive sheets from the weighing means, including means for lifting and removing successive sheets from the sheet receiving and supporting means, and paper-handling devices controlled by the weighing means for directing the sheets the like, the combination of claim 22 in which the weighing means is adapted to control the paperhandling devices in response to both under-weight and over-weight sheets for sorting the same from standard weight sheets. I

25. In a machine for sorting sheets of paper or the like, means for moving asuccession of sheets mentioned means and each of which comprises through the machine and means for discharging at a discharge station, only those of said sheets which have a predetermined standard lightmodifying character, said last-mentioned means including light-sensitive devices for successively testing each sheet of paper, one of said devices being adapted to test the sheet of paper for opacity by light transmitted through the paper,

and another of said devices being adapted to test the sheet of paper for shade by light reflected by the paper, and means under the control of said testing devices for diverting; at a single point in the path of travel of the sheets, sheets which are non-standard as to opacity or shade, said diverting means including a relay device automatically settable under control of the light-sensitiveetesting device to which the sheets are first advanced in the machine, and in accordance with the operation oi. said testing device upon each of a plurality of successive sheets, and a paper-deflecting device controlled by said relay device, said relay device being timed for control of said last-men-' 'tioned device in accordance with the advance of sheets through the machine, whereby the first testing operation on a given sheet of paper may be initiated before completion of operation of the diverting means upon a previous sheet of paper.

26. In a machine for sorting sheets of paper or the like; means for advancing successive sheets of paper through the machine, length-testing means, and means controlled thereby for per-,

forming sorting operations on the sheets, said length-testing means including a pair of normally closedcontact devices which are spaced lengthwise oi a sheet of paper advanced by the first contacting surfaces adapted for friction-free advance of a sheet of paper to and between the surfaces to mutually insulate them, and means adapted, under the electrical control of said devices, to control the sorting means in accordance with the presence or absence of a sheet of paper sufliciently long to open both said contact devices at once, each of said contact devices having its said contacting surfaces adapted for mutual contact on a predetermined line, said.

sheets in accordance with visual characteristics,

means for advancing successive sheets of paper into said area for operation of said first-mentioned'means on each sheet,and means including paper sheet-operated control devices respectively disposed beyond and behind said area in the direction of sheet travel, for rendering the firstmentioned means operative with respect to a sheet of paper advancing into said area, only when the sheet extends both beyond and behind the area.

EMILE JEAN FRANCOIS REY. 

